package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.SetmealDTO;
import com.sky.dto.SetmealPageQueryDTO;
import com.sky.entity.Setmeal;
import com.sky.entity.SetmealDish;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.SetmealDishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.result.PageResult;
import com.sky.service.SetmealService;
import com.sky.vo.DishItemVO;
import com.sky.vo.SetmealVO;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.List;

@Service
public class SetmealServiceImpl implements SetmealService {

    @Autowired
    private SetmealMapper setmealMapper;
    @Autowired
    private SetmealDishMapper setmealDishMapper;

    /**
     * 套餐分页查询
     *
     * @param queryDTO
     * @return
     */
    @Override
    public PageResult pageQuery(SetmealPageQueryDTO queryDTO) {
        PageHelper.startPage(queryDTO.getPage(), queryDTO.getPageSize());
        Page<SetmealVO> page = setmealMapper.pageQuery(queryDTO);

        long total = page.getTotal();
        List<SetmealVO> records = page.getResult();
        return new PageResult(total, records);
    }

    @Override
    public void addSetmeal(SetmealDTO setmealDTO) {
        //添加套餐
        Setmeal setmeal = new Setmeal();
        BeanUtils.copyProperties(setmealDTO, setmeal);
        setmealMapper.insertSetmeal(setmeal);
        //添加关联表
        SetmealDish setmealDish = new SetmealDish();
        BeanUtils.copyProperties(setmealDTO, setmealDish);
        List<SetmealDish> setmealDishes = setmealDTO.getSetmealDishes();
        setmealDishes.forEach(s -> {
            s.setSetmealId(setmeal.getId());
        });
        setmealDishMapper.insertBatch(setmealDishes);
    }

    @Override
    public SetmealVO getById(Integer id) {
        //将套餐表信息提取出来
        Setmeal setmeal = setmealMapper.getById(id);
        //将关联表信息提取出来
        Long setmealId = setmeal.getId();
        List<SetmealDish> setmealDishes = setmealDishMapper.getBySetmealId(setmealId);

        SetmealVO setmealVO = new SetmealVO();
        BeanUtils.copyProperties(setmeal, setmealVO);
        setmealVO.setSetmealDishes(setmealDishes);
        return setmealVO;
    }

    @Override
    public void startOrStop(Integer status, Integer id) {
        setmealMapper.updateStutusById(status, id);
    }

    @Override
    public void updateSetmeal(SetmealDTO setmealDTO) {
        //更新套餐表
        Setmeal setmeal = new Setmeal();
        BeanUtils.copyProperties(setmealDTO, setmeal);
        setmealMapper.updateSetmeal(setmeal);

        //更新套餐关系表
        //SetmealDish setmealDish = new SetmealDish();
        //setmealDish.setSetmealId(setmeal.getId());
        List<SetmealDish> setmealDishes = setmealDTO.getSetmealDishes();
        Long setmealId = setmeal.getId();
        setmealDishes.forEach(s -> {
            s.setSetmealId(setmeal.getId());
        });
        setmealDishMapper.deleteBysetmealId(setmealId);
        setmealDishMapper.insertBatch(setmealDishes);
    }

    /**
     * 条件查询
     *
     * @param setmeal
     * @return
     */
    public List<Setmeal> list(Setmeal setmeal) {
        List<Setmeal> list = setmealMapper.list(setmeal);
        return list;
    }

    /**
     * 根据id查询菜品选项
     *
     * @param id
     * @return
     */
    public List<DishItemVO> getDishItemById(Long id) {
        return setmealMapper.getDishItemBySetmealId(id);
    }

    /**
     * 批量删除套餐
     *
     * @param ids
     */
    @Transactional
    public void deleteBatch(List<Long> ids) {
        ids.forEach(id -> {
            Setmeal setmeal = setmealMapper.getById(Math.toIntExact(id));
            if (StatusConstant.ENABLE == setmeal.getStatus()) {
                //起售中的套餐不能删除
                throw new DeletionNotAllowedException(MessageConstant.SETMEAL_ON_SALE);
            }
        });

        ids.forEach(setmealId -> {
            //删除套餐表中的数据
            setmealMapper.deleteById(setmealId);
            //删除套餐菜品关系表中的数据
            setmealDishMapper.deleteBySetmealId(setmealId);
        });
    }
}
